Passive Transport

Front

What does it mean for a cell membrane to be selectively permeable?

Back

Cell membranes regulate which substances can enter and exit the cell.

Front

What happens to cells when pure water is introduced into the bloodstream?

Back

Cells expand and may burst due to excess water intake.

Front

What process allows water to move from soil into plant root cells?

Back

Osmosis.

Front

During osmosis, which direction do water molecules move when the concentration is higher outside the cell?

Back

Out of the cell, causing the cell to shrink.

Front

Which of the following is NOT a characteristic of passive transport?

Back

Energy is needed.

Front

Define passive transport.

Back

The movement of substances across a cell membrane without the use of energy.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.

Front

What is the difference between facilitated diffusion and simple diffusion?

Back

Facilitated diffusion requires specific transport proteins, while simple diffusion does not.

Front

What is the role of transport proteins in passive transport?

Back

Transport proteins help move substances across the cell membrane without energy.

Front

What is the concentration gradient?

Back

The difference in concentration of a substance between two areas.